Conduct a preliminary evaluation of the scene. First responders must assess the scene, taking into account the scope of the incident, emergency services required, safety
concerns, and evidence-related considerations.

When they first arrive at the scene, first responders should:

Establish a command post and implement an incident command system (i.e., a point of contact and line of communication and
authority for other public safety personnel).

DANGER: Beware of secondary devices! The scene may contain secondary explosive devices designed specifically to kill or maim public
safety responders. Do not touch any suspicious items. If a suspected secondary device is located, immediately evacuate the
area and contact bomb disposal personnel.

Exercise scene safety. First responders must identify and remove or mitigate safety hazards that may further threaten victims, bystanders, and public
safety personnel. They must exercise due caution while performing emergency operations to avoid injuries to themselves and
others.

Following the preliminary evaluation of the scene, first responders should:

Administer lifesaving efforts. First responders' have a primary responsibility to rescue victims and provide treatment for life-threatening injuries. While
performing emergency operations, they must preserve evidence and avoid disturbing areas not directly involved in the rescue
activities, including areas containing fatalities.